Patents by Inventor Kimio Yamato

Kimio Yamato has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Membrane treatment method and membrane treatment apparatus
    Patent number: 6224766
    Abstract: In a membrane treatment method, raw liquid is supplied to a circulation tank, and circulation liquid is supplied into an inter-membrane passage between filtration membranes disposed within a membrane apparatus, which is disposed separately from the circulation tank. Filtrate is obtained from the circulation liquid within the inter-membrane passages via the filtration membranes, and the circulation liquid is circulated by a circulation pump disposed between the circulation tank and the membrane apparatus, while returning the remaining circulation liquid to the circulation tank. A portion of the circulation liquid overflows from the circulation tank. A membrane treatment apparatus comprises a membrane apparatus, a circulation tank, and a circulation pump. The membrane apparatus includes filtration membranes disposed to form an inter-membrane passage between the filtration membranes. The membrane apparatus takes out filtrate from circulation liquid in the inter-membrane passage.
    Type: Grant
    Filed: March 5, 1999
    Date of Patent: May 1, 2001
    Assignee: Mitsui Chemicals, Inc.
    Inventors: Kimio Yamato, Tadaaki Hashimoto